I would definitely do the threadfin shad. getting off the couch, capturing the shad, and walking them over that 100 yards is actually a bit more effort than it sounds like, but definitely worth the effort. sounds like a fun little experiment you got going on. at 200+ bass you are definitely pushing the envelope and it all could come crashing down at some point, but keep us posted and definitely post some pics when you get a chance. I love experiments such as yours.